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中国防痨杂志 ›› 2012, Vol. 34 ›› Issue (8): 527-531.

• 论著 • 上一篇    下一篇

MGIT 960系统行二线抗结核药物敏感性试验的实用性评价

蒋俊 张娟 张红 贾琳 魏成翠 石莲 马静红 杨立军   

  1. 110044 沈阳市胸科医院结核病实验室(蒋俊、张娟、张红、贾琳、魏成翠、马静红),结核二病房(石莲);辽宁省疾病预防控制中心结核病防治所结核病实验室(杨立军)
  • 收稿日期:2012-01-30 出版日期:2012-08-10 发布日期:2012-08-10
  • 通信作者: 蒋俊 E-mail:xkyyjykjj@sina.com
  • 基金资助:

    卫生部国际交流与合作中心-碧迪(Becton Dickinson, BD)结核病控制项目《结核病细菌学快速诊断技术和药敏试验临床试验》(MOH-BD-2-3)

The practical evaluation of second-line anti-tuberculosis drug susceptibility test using MGIT 960 system

JIANG Jun, ZHANG Juan,ZHANG Hong, JIA Lin, WEI Cheng-cui, SHI Lian, MA Jing-hong, YANG Li-jun   

  1. TB laboratory of Shenyang Chest hospital, Shenyang 110044,China
  • Received:2012-01-30 Online:2012-08-10 Published:2012-08-10
  • Contact: JIANG Jun E-mail:xkyyjykjj@sina.com

摘要: 目的  评价全自动BACTEC MGIT 960系统在结核分枝杆菌二线抗结核药物(second-line anti-TB drugs,SLD)药敏试验中的实用性。 方法  本实验纳入患者435例。该纳入患者均通过痰涂片抗酸染色(萋-尼法)镜检,L-J固体和MGIT 960系统液体培养及鉴定,共筛查出阳性菌株212例。212例阳性菌株分别进行一线抗结核药物异烟肼(INH)、利福平(RFP)、链霉素(S)和乙胺丁醇(EMB)的耐药性试验,其中耐药菌株(所有耐药株)118例。以118例耐药株作为SLD药敏试验实验株,应用L-J和MGIT 960两种方法分别进行卷曲霉素(Cm)、卡那霉素(Km)、氧氟沙星(Ofx)和乙硫异烟胺(Eto)的药物敏感性试验,并计算出两方法药敏试验所需的时间和符合率;L-J和MGIT960两种培养方法的比较采用配对设计的卡方检验;两种方法检测结果的一致性用Kappa值检验判别。 结果  MGIT 960系统药敏试验所需时间平均10.0 d(1183/118),L-J固体培养法所需时间平均28.5 d(3360/118),两者相差18.5 d。MGIT 960与L-J培养法的SLD Cm、Km、Ofx和Eto敏感及耐药符合率和一致性检验Kappa值分别为88.1%(104/118)和0.520;95.8%(113/118)和0.815;91.5%(108/118)和0.824;71.2%(84/118)和0.375。 结论  MGIT 960系统液体培养法常用SLD药敏试验与金标准(L-J培养)比较除Eto外符合率高、一致性好;该方法检测快速、准确,具有很强的实用性,可作为结核分枝杆菌快速培养和药敏试验的新方法。

关键词: 分枝杆菌, 结核, 抗生素类, 抗结核, 微生物敏感性试验, 细菌学技术, 培养基

Abstract: Objective  To evaluate the practicality of automatic BACTEC MGIT960 system in second-line anti-tuberculosis (TB) drug susceptibility test.  Methods 212 M. tuberculosis strains were isolated and idenfied from the sputum specimen in 435 cases by the smear, Lowenstein-Jenson (L-J) solid culture and MGIT960 liquid culture and identification. These strains were determined the resistance to first-line anti-TB drugs including isoniazid (INH), rifampicin (RFP),streptomycin (S) and ethambutol (EMB) by L-J proportion method, respectively. Then the first-line anti-TB drug-resistant strains were further determined the resistance to second-line anti-TB drugs including capreomycin (Cm), kanamycin (Km),ofloxacin (Ofx) and ethionamide (Eto)  by L-J and MGIT960, respectively.  The detection time and accordance rate of the two methods were compared.  Results The times of drug susceptibility test by MGIT960 and L-J method were average 10.0 days (1183/118) and 28.5 days (3360/118), respectively. There was difference of 18.5 days (28.5-10.0) between two methods. The accordance rates of MGIT960 and L-J method in Cm, Km, Ofx and Eto susceptibility test were 88.1%(104/118), 95.8%(113/118), 91.5%(108/118) and 71.2%(84/118).   Conclusion The second-line anti-TB drug susceptibility test using MGIT960 system is fast, accurate and has higher practical value.

Key words: Mycobacterium tuberculosis, Antibiotics,antitubercular, Microbial sensitivity tests, Bacteriological techniques, Culture media